Window-scaffold.



A. B. BYRD.

WINDOW SUAFFOLDL APPLIOATION FILED AUG. 19, 1909.

Patented Sept. 6,1910.

2 SHEETS-SHEET 1.

A. B. BYRD.

WINDOW SGAFFOLD.

APPLICATION FILED 16.19, 1909.

Patented Sept. 6,1910.

2 EHEETB-BHEET 2.

ARTHUR BEN BYRD, OF OKLAHOMA, OKLAHOMA.

WINDOW-SGAFFOLD.

Specification of Letters Patent.

Application filed August 19, 1909.

Patented Sept. 6, 1910.

Serial No. 513,627.

T 0 all whom it may concern:

Be it known that I, ARTHUR B. BYRD, citizen of the United States,residing at Oklahoma city, in the county of Oklahoma and State ofOklahoma, have invented certain new and useful Improvements in Window-Scaifolds, of which the following is a specification.

This invention relates to brackets, and has special reference to abracket to be applied to windows to facilitate the washing of the same.

An object of the invention is to provide an improved device which isadapted for engagement with windows of various constructions and onewhich at the same time will be rigidly secured thereto and support theweight of a person washing the window.

The invention further contemplates the provision of an improved articleof this nature which may be folded into small space and convenientlycarried from place to place and which may be quickly attached anddetached to and from the window.

A further object of this invention is to provide a device which can beutilized for enabling the washing of windows of buildings and oflessening the danger incident to cleaning the glass in the same as thewasher is required to stand on the outer side of the window in order toreach the panes of the same.

For a full understanding of the invention and the merits thereof, andalso to acquire a knowledge of the details of construction and the meansfor effecting the result, reference is to be had to the followingdescription, and accompanying drawings, in which;

Figure 1 is a perspective view of the device as applied to a window;Fig. 2 is a side elevation of the device as applied to the lower end ofthe window casing; the window casing being disclosed in section, andFig. 3 is an elevation of the lower ends of the bracket as applied tothe inside of the window.

Corresponding and like parts are referred to in the followingdescription, and indicated in all the views of the accompanying drawingsby the same reference characters.

Referring to the drawings, the numerals 10 and 11 designate a pair ofbeams which are disposed against the sill of a window frame, andextended inwardly from the same; the under edges of the beams 10 and 11are longitudinally grooved as at 12 to accommodate the upper reducedends of a pair of looped strips 13 which are pivotally en gaged with thebeams 10 and 11 and in the grooves 12. The looped strips 13 are dependedfrom an intermediate point on each of the beams 10 and 11 in registeredrelation and adjacent the outer ends of the beams 10 and 11 for thepurpose of engaging against the outer edge of the window sill 14:. Thelooped strips 13 are provided with elongated slots in their lower endsto accommodate the braces 15 which are pivotally secured upon the outerfaces of the beams 10 and 11 and extended downwardly and inwardly in adiagonal direction for engagement against the wall of a building. Thebraces 15 are supported in the ends of the looped strips 13 to preventthe falling downwardly of the same, and are provided with a retainingrod 16, which is secured at its opposite ends to the braces 15 andserves the purpose of preventing the spreading of the same.

Across the upper edges of the beams 10 and 11 a platform 17 ispositioned adjacent the ends of the beams, for the purpose of forming asupport for the window washer or a stand for supporting the operatorduring the operation of cleaning the window.

Depended from the inner ends of the beams 10 and 11 are bars 18 whichare provided with pawls 19 adjacent their upper ends for engagement withthe under face of the window sill extension 20 to prevent the upwardmovement of the inner ends of the beams 10 and 11. The pawls 19 arecomposed of metallic plates which are of substantially rectangularformation having upwardly projected teeth 21 which engage within theupper face of the sill extension 20, and which are provided withhand-engaging portions 22 to enable the movement of the pawl 19 about apivot pin 23 which is engaged through the lower inward corner of thesame and terminated in the adjacent bar 18. At the lower ends of thebars 18 a second pair of pawls 2 1 are provided which are of the sameformation as the pawl 19 and which are provided with teeth 25 forengagement 9 beneath the under edge of the apron 26 of the window. Thepawls 24 are provided for the further support of the braces 18. A crossbrace 27 is secured between the bars 18 to prevent the spreading of thesame.

Upon the outer ends of the beams 10 and 11 standards 28 and 29 areprovided which are pivotally mounted to the beams through the medium ofa pivot rod 30, which is carried between the outer ends of the beams 10and 11 and which serves the double purpose of supporting the standards28 and 29 and of bracing the outer extremities of the beams 10 and 11.The standards 28 and 29 are retained in an upward position through themedium of a pair of braces 31 which are pivotally mounted upon the crossrod 32 carried by the beams 10 and 11. The rod 32 is extended at itsopposite extremities through the grooves 12 and the upper ends of thelooped strips 13 to pivotally support the same.

The upper extremities of the braces 31 are provided with slots 33 whichextend from the under edges of the same inwardly of the braces 31 andengage about studs 34 which are inwardly projected from the oppositefaces of the standards 28 and 29. The standards 28 and 29 are reinforcedby the provision of cross arms 35 and 36 which are respectivelypositioned across the outer edges of the standards 28 and 29intermediately thereof and at the upper end of the same. A leaf 37 ishingedly secured to the upper crossarm 36.

Secured through the standards 28 and 29 and extended outwardly therefromadjacent the upper ends of the same are eye bolts 38 which pivotallysupport bracket arms 39. The upper ends of the bracket arms 39 arerecessed as at 40 for the reception of pins 41 which are outwardlyextended from the leaf 37 in order to support the same in asubstantially horizontal position.

The improved scaffold is supported upon the window by the provision of apair of straps 42 which extend upwardly from the eye bolts 38 to aposition at the upper end of the window where they are secured to clamps43 of any suitable construction. As disclosed in the drawings the clampswhich comprise a U-shaped member are secured on the side of the windowcasing and provided with a threaded bolt 44 having a winged extremity 45for engagement with the hand of the operator in order to fit the boltsinwardly against the inner face of the said casing and to therebyposition the clamps 43 rigidly thereon. The clamps 43 are made in anymanner desired provided that they are adapted to fit window casings ofvarious forms and to which may be attached the straps 42.

The leaf 37 serves as a support for the receptacle for'containing thewater or solution for cleansing the window and also for the reception ofthe implements employed in such work. If desired the same could beutilized for standing upon or as a step or platform which may beemployed for the support of the implements employed.

It will be noted that the improved scaffold may be applied to windowcasings of various thicknesses by the provision of a series of apertures46 which are formed through the braces 15 in order to permit of theadjustment of the retaining rod 16 to swing the depending looped strips13 outwardly and inwardly as is required to raise or lower the braces 15to engage rigidly with the sides of a wall.

Having thus described the invention,what is claimed as new is:

1. A scaffold including a pair of beams arranged in spaced relationacross the window sill, looped straps depended from the outer ends ofsaid beams for engagement against the outer face of the sill, braceshingedly supported at the forward extremities of said beams and extendedinwardly through said straps, a retaining rod carried by said braces forengagement against the lower ends of said straps, bars depended from theinner ends of said beams for engagement against the inner face of thesill, bolts disposed upon said bars, teeth formed upon the upper facesof said bolts to engage in the sill to retain the beams in position,standards upwardly extended from the outer ends of said beams, a leafhingedly disposed on the ends of said standards, and means carried bythe window and connected to the upper ends of said standards forretaining the same in position.

2. A scaflold including a pair of spaced beams, braces depended from theforward ends of said beams, looped straps carried by said beams andconnected to said braces to hold the same inwardly at their lower ends,bars depended from the rear ends of said beams, pawls carried by saidbars, said braces and said pawls adapted to engage against the oppositesides of a sill for supporting said beams thereon, and supporting meansupwardly extended from the outer ends of said beams. 1

signa- In testimony whereof, I aiiix my ture in presence of twowitnesses.

ARTHUR BEN BYRD. [1,. s]

D. V. WVALKER.

